You might want to stop making these. From there Hero Forge TOS:

"For the avoidance of doubt, you expressly agree that all intellectual property rights in and to any and all character or other designs or any 3D Models that you may create on or through the site (“Character Designs”) and all Content are the property of Sky Castle Studios and you hereby (A) irrevocably assign, transfer and convey, to the extent permitted by applicable law, all right, title and interest you may have in and to the Character Designs and the Content on a worldwide basis (including, without limitation, rights under patent, copyright, trademark, trade secret, unfair competition and related laws) to Sky Castle Studios or such other entity as Sky Castle Studios shall designate, to the extent ownership of any such rights does not automatically vest in Sky Castle Studios under applicable law, and (B) waive any moral rights therein to the fullest extent permitted under applicable law. You agree to execute any further documents and take any further actions requested by Sky Castle Studios to assist it in validating, effectuating, maintaining, protecting, enforcing, perfecting, recording, patenting or registering any of its right, title and interest in or to the Character Designs or the Content."

I am aware of that, that's why I don't save them, I delete them.

Ah good!